01/07/2013: Exchange rate unification
North Korea unifies the official exchange rate and market rate, resulting in a significant depreciation of the won.
30/11/2009: Currency revaluation
North Korean government announces a currency revaluation, replacing the old won notes at a ratio of 1 for 100.
10/09/2008: Introduction of Birr Denominations
Ethiopia introduced new banknotes of different denominations in an effort to combat counterfeiting and improve security features.
01/12/2001: Currency redenomination
North Korean won is redenominated, with the previous notes and coins being replaced by new ones at a ratio of 1 for 1,000.
25/02/1992: Introducing foreign exchange certificates
North Korea introduces foreign exchange certificates to counter hyperinflation and stabilize its economy.
27/05/1991: Introduction of Birr Coins
Ethiopia introduced coins for the birr denominations, replacing the previous notes.
06/12/1979: Second major revaluation
North Korean won undergoes its second major revaluation, with the exchange rate being set at 1 for 10.
17/09/1976: Introduction of New Birr
A new birr was introduced, replacing the previous Ethiopian birr and being equal to 100 old birr.
31/12/1959: First major revaluation
North Korean won undergoes its first major revaluation, with the exchange rate being set at 1 for 100.
06/12/1947: Introduction of North Korean won
North Korean won is introduced as the official currency of North Korea, replacing the Korean yen at par value.
08/07/1945: Decree to Change Birr Decimalization
Ethiopia changed the birr decimalization from talari and ghersh to dollars and cents.
31/12/1931: Introduction of Ethiopian birr
The Ethiopian birr was introduced as the official currency, replacing the Maria Theresa Thaler.
05/07/1931: Ethiopian Monetary Authority Established
The Ethiopian Monetary Authority was established to regulate the country's monetary system and issue currency.
14/02/1894: Introduction of Maria Theresa Thaler
Ethiopia adopted the Maria Theresa Thaler as the official currency, which remained in circulation until 1935.